Chofetz Chaim Daily 7 Teves 6:1 Asur to believe rechilus even if it was said in the presence of many people. 6:2 Asur to believe rechilus even if said in front of the subject. If he doesn’t protest, it doesn’t mean he agrees to the story. Anyway, why believe someone who’s saying useless info & committing many sins, to ruin the reputation of a good person?!
Chofetz Chaim Daily 5 Teves 5:5 The Chofetz Chaim bemoans the widespread practice of people asking others what ploni said about him & ploni’s opinion of him. It is destructive behavior and transgresses many negative commandments.